component

SMBJ140A

Public Made by Adom

by adom

FUXINSEMI ESD And Surge Protection (TVS/ESD), DO-214AA(SMB). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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SMBJ140A

FUXINSEMI · ESD And Surge Protection (TVS/ESD) · DO-214AA(SMB)

SMBJ140A from FUXINSEMI, in a DO-214AA(SMB). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 K passive Cathode (marked by cathode band) of the uni-directional SMBJ140A TVS; connects to the protected positive line, with VRWM 140 V and VBR 155-171 V at 1.0 mA.
2 A passive Anode of the uni-directional SMBJ140A TVS; connects to ground/return, clamping at a maximum VC of 226.8 V at IPP 2.65 A.

Key specifications

Parameter Value
Manufacturer FUXINSEMI
Package DO-214AA(SMB)
Category Circuit Protection
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Reverse stand-off voltage VRWM 140 V 3
Breakdown voltage VBR 155 171 V @IT = 1.0 mA 3
Maximum clamping voltage VC 226.8 V @IPP 3
Peak pulse current IPP 2.65 A 10/1000 µs waveform 3
Maximum reverse leakage current IR 5 µA @VRWM 3
Breakdown test current IT 1 mA 3
Peak power dissipation PPPM 600 W 10/1000 µs waveform, Note 1, 2 & Fig. 1 1
Steady state power dissipation PM(AV) 5 W at TL=75 °C, Note 2 1
Peak forward surge current IFSM 100 A 8.3ms single half sine-wave, Note 3 1
Maximum instantaneous forward voltage VF 3.5 V at 50A, uni-directional only, VBR<200V 1
Operating junction temperature range TJ -55 150 °C 1
Storage temperature range TSTG -55 150 °C 1
Typical thermal resistance, junction to case RθJC 30 °C/W 1
Typical thermal resistance, junction to ambient RθJA 50 °C/W 1

CAD (KiCad official)

  • Symbol: SMBJ140A
  • Footprint: Diode_SMD:D_SMB
  • 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
  • 3D model files: smbj140a-etched.step / smbj140a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smbj140a.step / smbj140a.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: FUXINSEMI datasheet (6 pp, sha256 0ca2804d68ee4162, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF